Submission #1417479

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Source Code Expand

import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N=sc.nextInt();
		String S=sc.next();
		int[] dp=new int[N];
		for(int i=0;i<N;i++){
			dp[i]=0;
		}
		for(int i=1;i<3;i++)
			if(S.charAt(i)=='X')
				dp[i]=1;	
		for(int i=3;i<N;i++){
			dp[i]=Math.min(dp[i-1],Math.min(dp[i-2],dp[i-3]));
			if(S.charAt(i)=='X')
				dp[i]++;
		}
		System.out.println(dp[N-1]);
	}
}

Submission Info

Judge Result